Well, to start with, you say you want to delete.. "other than cover art and metadata" I am assuming that you already know where those files are. Your original statement "how to uninstall javluv browser? other than cover art and metadata," could mean that you already know where the cover art and metada is or it could mean that you don't want to delete that information. IF you are in any way unclear about what I have said, don't follow my advice. Wait for TmpGuy to address it because I'm going on the assumption that you mean you want to get rid of everything and not that you want to retain the cover art and metadata for some other purpose.
In Windows 11, Go to C:\Users\USER\AppData\Local\JavLuv (this is where the cover art/metadata is stored) in my chain the second folder in the chain USER is my computer name, you may have named it somethng else so under the Users directory look for a folder with your computer name and then follow the string to the javluv folder, just manually delete the folder (doing so will delete your actress data and cover thumbnails.
You should have one other folder called Javluv wherever you originally installed the program. Typically on C but it could be Anywhere. If you have shortcut to the program, right click on it and choose, Open file location, that will take you to the actual folder where the shortcut exists, then right click on that icon and again click 'Open file location" this will take you to the actual install location. Click the up arrow in this window to go to the parent directory for this program. Then you can see where the program files exist. Just delete that javluv folder. That should do it.
Last point. Your original statement "how to uninstall javluv browser? other than cover art and metadata," could mean that you already know where the cover art and metada is or it could mean that you don't want to delete that information. IF you are in any way unclear about what I have said, don't follow my advice. Wait for TmpGuy to address it because I'm going on the assumption that you mean you want to get rid of everything and not retain the cover art and metadata for some other purpose.